docs: def datasets(ctx):
      """Read and write GeoJSON from Mapbox-hosted datasets
  
      All endpoints require authentication. An access token with
      appropriate dataset scopes is required, see `mapbox --help`.
  
      Note that this API is currently a limited-access beta.
      """
  
      access_token = (ctx.obj and ctx.obj.get('access_token')) or None
      service = mapbox.Datasets(access_token=access_token)
      ctx.obj['service'] = service